Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 27 Mar 2015, 20:07

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# How many POSITIVE INTEGER solutions does the folowing

Author Message
TAGS:
CEO
Joined: 15 Aug 2003
Posts: 3470
Followers: 61

Kudos [?]: 697 [0], given: 781

How many POSITIVE INTEGER solutions does the folowing  [#permalink]  02 Oct 2003, 23:19
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
How many POSITIVE INTEGER solutions does the folowing
equation have: x+y =20
SVP
Joined: 03 Feb 2003
Posts: 1611
Followers: 6

Kudos [?]: 74 [0], given: 0

In a form (x, y), there are 19 positive integer solutions.
1+19
2+18
.....
19+1
Senior Manager
Joined: 21 Aug 2003
Posts: 258
Location: Bangalore
Followers: 1

Kudos [?]: 4 [0], given: 0

stolyar, what about (0,20) & (20,0)...?
another way to look at it is y = -x + 20.
Equation of a line that cuts Y axis at 20. Now from origin(i.e. 0) to 20 are the number of possible positive solutions to this equation (i.e. 21).
thanks.
SVP
Joined: 03 Feb 2003
Posts: 1611
Followers: 6

Kudos [?]: 74 [0], given: 0

OK, but 0 is neither positive nor negative. You should have known this fact. The initial question clearly demands to find only positive solutions. So, I insist on my answer.
Similar topics Replies Last post
Similar
Topics:
4 How many distinct factors does positive integer k have? 6 25 Nov 2014, 07:33
1 How many factors does x have, if x is a positive integer ? 4 17 Nov 2014, 11:29
3 How many prime factors does positive integer n have? 3 29 Mar 2011, 11:30
How many 3 digit positive integers divisible by 7. solution: 1 16 Nov 2006, 15:37
If x is a positive integer, then how many factors does x 16 13 Sep 2005, 10:03
Display posts from previous: Sort by